📄 Description (English)
GNU Bourne-Again Shell (Bash) Arbitrary Code Execution Vulnerability — GNU Bash through 4.3 processes trailing strings after function definitions in the values of environment variables, which allows remote attackers to execute code. This CVE correctly remediates the vulnerability in CVE-2014-6271.
🤖 AI Executive Summary
CVE-2014-7169 is a critical remote code execution vulnerability in GNU Bash (Shellshock) affecting versions through 4.3. Attackers can execute arbitrary commands by exploiting how Bash processes environment variables with trailing strings after function definitions. This is an incomplete patch for CVE-2014-6271 and remains actively exploited. Given Saudi Arabia's extensive use of Linux-based systems across critical infrastructure, government services, and financial institutions, this represents a severe threat requiring immediate remediation.
📄 Description (Arabic)
🤖 AI Intelligence Analysis Analyzed: Mar 24, 2026 05:50
🇸🇦 Saudi Arabia Impact Assessment
This vulnerability poses extreme risk to Saudi organizations across all sectors. Banking sector (SAMA-regulated institutions) running Linux-based core banking systems, ATM networks, and payment gateways are at critical risk of unauthorized transactions and data breaches. Government entities under NCA oversight using Linux servers for citizen services, e-government platforms (Yesser), and national databases face potential compromise of sensitive citizen data and service disruption. Energy sector (ARAMCO, SEC, SWCC) with SCADA systems and industrial control systems on Linux platforms risk operational disruption and safety incidents. Telecom operators (STC, Mobily, Zain) with network infrastructure and billing systems face service outages and subscriber data exposure. Healthcare institutions with patient management systems risk HIPAA-equivalent violations and patient data breaches. The vulnerability is particularly dangerous as it can be exploited through web applications (CGI scripts), DHCP clients, SSH servers, and any service passing user input to shell commands.
🏢 Affected Saudi Sectors
Banking
Government
Energy
Telecommunications
Healthcare
Education
E-commerce
Critical Infrastructure
⚖️ Saudi Risk Score (AI)
9.5
/ 10.0
🔧 Remediation Steps (English)
IMMEDIATE ACTIONS:
1. Identify all systems running Bash versions through 4.3 using: bash --version
2. Implement emergency network segmentation to isolate vulnerable systems from internet-facing services
3. Deploy IDS/IPS signatures to detect Shellshock exploitation attempts
4. Review web server logs for suspicious patterns: () { :;}; in User-Agent, Referer, and custom headers
PATCHING GUIDANCE:
1. Apply vendor-specific patches immediately:
- RHEL/CentOS: yum update bash
- Ubuntu/Debian: apt-get update && apt-get install --only-upgrade bash
- SUSE: zypper update bash
2. Verify patch effectiveness using: env x='() { :;}; echo vulnerable' bash -c "echo test"
3. Restart all services that invoke shell commands (Apache, nginx, SSH, DHCP)
4. For systems that cannot be patched immediately, disable CGI scripts and restrict shell access
COMPENSATING CONTROLS:
1. Deploy WAF rules blocking patterns: () { :;};, () { _; }, and function definitions in HTTP headers
2. Implement strict input validation for all user-supplied data passed to system commands
3. Use ModSecurity rules specifically for Shellshock (SecRule REQUEST_HEADERS)
4. Enable SELinux/AppArmor in enforcing mode to limit shell command execution
5. Restrict outbound connections from web servers to prevent reverse shells
DETECTION RULES:
1. Monitor for unusual child processes spawned by web servers (httpd, nginx)
2. Alert on bash execution with suspicious environment variables
3. Track outbound connections from typically non-communicating services
4. Implement SIEM correlation rules for CVE-2014-7169 exploitation indicators
🔧 خطوات المعالجة (العربية)
الإجراءات الفورية:
1. تحديد جميع الأنظمة التي تشغل Bash حتى الإصدار 4.3 باستخدام: bash --version
2. تنفيذ عزل طارئ للشبكة لفصل الأنظمة المعرضة للخطر عن الخدمات المتصلة بالإنترنت
3. نشر توقيعات IDS/IPS للكشف عن محاولات استغلال Shellshock
4. مراجعة سجلات خادم الويب للبحث عن أنماط مشبوهة: () { :;}; في User-Agent وReferer والرؤوس المخصصة
إرشادات التصحيح:
1. تطبيق التصحيحات الخاصة بالموردين فوراً:
- RHEL/CentOS: yum update bash
- Ubuntu/Debian: apt-get update && apt-get install --only-upgrade bash
- SUSE: zypper update bash
2. التحقق من فعالية التصحيح باستخدام: env x='() { :;}; echo vulnerable' bash -c "echo test"
3. إعادة تشغيل جميع الخدمات التي تستدعي أوامر shell (Apache، nginx، SSH، DHCP)
4. للأنظمة التي لا يمكن تصحيحها فوراً، تعطيل نصوص CGI وتقييد الوصول إلى shell
الضوابط التعويضية:
1. نشر قواعد WAF لحظر الأنماط: () { :;};، () { _; }، وتعريفات الدوال في رؤوس HTTP
2. تنفيذ التحقق الصارم من المدخلات لجميع البيانات المقدمة من المستخدم والممررة لأوامر النظام
3. استخدام قواعد ModSecurity المخصصة لـ Shellshock
4. تفعيل SELinux/AppArmor في وضع الإنفاذ للحد من تنفيذ أوامر shell
5. تقييد الاتصالات الصادرة من خوادم الويب لمنع reverse shells
قواعد الكشف:
1. مراقبة العمليات الفرعية غير العادية المنبثقة من خوادم الويب
2. التنبيه عند تنفيذ bash مع متغيرات بيئة مشبوهة
3. تتبع الاتصالات الصادرة من الخدمات التي لا تتصل عادةً
4. تنفيذ قواعد ارتباط SIEM لمؤشرات استغلال CVE-2014-7169
📋 Regulatory Compliance Mapping
🟢 NCA ECC 2024
5-1-1: Vulnerability Management - Critical vulnerability remediation within 15 days
5-1-2: Patch Management - Emergency patching procedures for critical systems
4-1-1: Network Security - Network segmentation and access controls
6-1-1: Security Monitoring - Continuous monitoring and threat detection
3-2-1: Secure Configuration - Hardening of operating systems and applications
🔵 SAMA CSF
D1.G1: Vulnerability Assessment and Management
D1.G2: Patch Management for Critical Systems
D2.G4: Network Security Controls and Segmentation
D3.G1: Security Event Logging and Monitoring
D5.G1: Incident Response and Management
🟡 ISO 27001:2022
A.12.6.1: Management of technical vulnerabilities
A.12.2.1: Controls against malware
A.13.1.1: Network controls and segmentation
A.12.4.1: Event logging and monitoring
A.16.1.1: Incident management responsibilities
🟣 PCI DSS v4.0
6.2: Ensure all systems are protected from known vulnerabilities
6.6: Web application protection mechanisms
10.6: Review logs and security events daily
11.4: Use intrusion detection/prevention systems
🔗 References & Sources 0
No references.
📦 Affected Products / CPE 1 entries
GNU:Bourne-Again Shell (Bash)